Question

vb.net问题

Me.Dispose和Me.Close和End有什么区别?哪个资源释放的更彻底?

Answer 1

　　me.dispose是最彻底释放资源； Me.Close 是关闭 end 只是结束 一般用在程序的语句中，如结束语句。
　　执行 dispose 后,由.net 的GC垃圾回收器周期性地回收资源, me.close 方法的基类会调用 dispose 方法end 是从vb中继承下来的语句,直接指示退出程序.程序的资源将被释放,程序并未希望结束时,不适合使用该方法.若要强行退出应用程序,

Answer 2

执行 dispose 后,由.net 的GC垃圾回收器周期性地回收资源, me.close 方法的基类会调用 dispose 方法end 是从vb中继承下来的语句,直接指示退出程序.程序的资源将被释放,程序并未希望结束时,不适合使用该方法.若要强行退出应用程序,在.net中可以使用Environment.Exit(0) 下面是 system.windows.forms.form 类对 close 和 dispose 的封装:'------- ClosePublic Sub Close()
If MyBase.GetState(&H40000) Then
Throw New InvalidOperationException(SR.GetString("ClosingWhileCreatingHandle", New Object() { "Close" }))
End If
If MyBase.IsHandleCreated Then
Me.closeReason = CloseReason.UserClosing
MyBase.SendMessage(&H10, 0, 0)
Else
MyBase.Dispose
End If
End Sub '------- Dispose Protected Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
Me.CalledOnLoad = False
Me.CalledMakeVisible = False
Me.CalledCreateControl = False
If MyBase.Properties.ContainsObject(Form.PropAcceptButton) Then
MyBase.Properties.SetObject(Form.PropAcceptButton, Nothing)
End If
If MyBase.Properties.ContainsObject(Form.PropCancelButton) Then
MyBase.Properties.SetObject(Form.PropCancelButton, Nothing)
End If
If MyBase.Properties.ContainsObject(Form.PropDefaultButton) Then
MyBase.Properties.SetObject(Form.PropDefaultButton, Nothing)
End If
If MyBase.Properties.ContainsObject(Form.PropActiveMdiChild) Then
MyBase.Properties.SetObject(Form.PropActiveMdiChild, Nothing)
End If
If (Not Me.MdiWindowListStrip Is Nothing) Then
Me.MdiWindowListStrip.Dispose
Me.MdiWindowListStrip = Nothing
End If
If (Not Me.MdiControlStrip Is Nothing) Then
Me.MdiControlStrip.Dispose
Me.MdiControlStrip = Nothing
End If
If (Not Me.MainMenuStrip Is Nothing) Then
Me.MainMenuStrip = Nothing
End If
Dim form As Form = DirectCast(MyBase.Properties.GetObject(Form.PropOwner), Form)
If (Not form Is Nothing) Then
form.RemoveOwnedForm(Me)
MyBase.Properties.SetObject(Form.PropOwner, Nothing)
End If
Dim formArray As Form() = DirectCast(MyBase.Properties.GetObject(Form.PropOwnedForms), Form())
Dim i As Integer = (MyBase.Properties.GetInteger(Form.PropOwnedFormsCount) - 1)
Do While (i >= 0)
If (Not formArray(i) Is Nothing) Then
formArray(i).Dispose
End If
i -= 1
Loop
If (Not Me.smallIcon Is Nothing) Then
Me.smallIcon.Dispose
Me.smallIcon = Nothing
End If
Me.ResetSecurityTip(False)
MyBase.Dispose(disposing)
Me.ctlClient = Nothing
Dim menu As MainMenu = Me.Menu
If ((Not menu Is Nothing) AndAlso (menu.ownerForm Is Me)) Then
menu.Dispose
MyBase.Properties.SetObject(Form.PropMainMenu, Nothing)
End If
If (Not MyBase.Properties.GetObject(Form.PropCurMenu) Is Nothing) Then
MyBase.Properties.SetObject(Form.PropCurMenu, Nothing)
End If
Me.MenuChanged(0, Nothing)
Dim menu2 As MainMenu = DirectCast(MyBase.Properties.GetObject(Form.PropDummyMenu), MainMenu)
If (Not menu2 Is Nothing) Then
menu2.Dispose
MyBase.Properties.SetObject(Form.PropDummyMenu, Nothing)
End If
Dim menu3 As MainMenu = DirectCast(MyBase.Properties.GetObject(Form.PropMergedMenu), MainMenu)
If (Not menu3 Is Nothing) Then
If ((menu3.ownerForm Is Me) OrElse (menu3.form Is Nothing)) Then
menu3.Dispose
End If
MyBase.Properties.SetObject(Form.PropMergedMenu, Nothing)
End If
Else
MyBase.Dispose(disposing)
End If
End Sub

Answer 3

执行 dispose 后,由.net 的GC垃圾回收器周期性地回收资源, me.close 方法的基类会调用 dispose 方法end 是从vb中继承下来的语句,直接指示退出程序.程序的资源将被释放,程序并未希望结束时,不适合使用该方法.若要强行退出应用程序,在.net中可以使用Environment.Exit(0) 下面是 system.windows.forms.form 类对 close 和 dispose 的封装:'------- ClosePublic Sub Close()
If MyBase.GetState(&H40000) Then
Throw New InvalidOperationException(SR.GetString("ClosingWhileCreatingHandle", New Object() { "Close" }))
End If
If MyBase.IsHandleCreated Then
Me.closeReason = CloseReason.UserClosing
MyBase.SendMessage(&H10, 0, 0)
Else
MyBase.Dispose
End If
End Sub '------- Dispose Protected Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
Me.CalledOnLoad = False
Me.CalledMakeVisible = False
Me.CalledCreateControl = False
If MyBase.Properties.ContainsObject(Form.PropAcceptButton) Then
MyBase.Properties.SetObject(Form.PropAcceptButton, Nothing)
End If
If MyBase.Properties.ContainsObject(Form.PropCancelButton) Then
MyBase.Properties.SetObject(Form.PropCancelButton, Nothing)
End If
If MyBase.Properties.ContainsObject(Form.PropDefaultButton) Then
MyBase.Properties.SetObject(Form.PropDefaultButton, Nothing)
End If
If MyBase.Properties.ContainsObject(Form.PropActiveMdiChild) Then
MyBase.Properties.SetObject(Form.PropActiveMdiChild, Nothing)
End If
If (Not Me.MdiWindowListStrip Is Nothing) Then
Me.MdiWindowListStrip.Dispose
Me.MdiWindowListStrip = Nothing
End If
If (Not Me.MdiControlStrip Is Nothing) Then
Me.MdiControlStrip.Dispose
Me.MdiControlStrip = Nothing
End If
If (Not Me.MainMenuStrip Is Nothing) Then
Me.MainMenuStrip = Nothing
End If
Dim form As Form = DirectCast(MyBase.Properties.GetObject(Form.PropOwner), Form)
If (Not form Is Nothing) Then
form.RemoveOwnedForm(Me)
MyBase.Properties.SetObject(Form.PropOwner, Nothing)
End If
Dim formArray As Form() = DirectCast(MyBase.Properties.GetObject(Form.PropOwnedForms), Form())
Dim i As Integer = (MyBase.Properties.GetInteger(Form.PropOwnedFormsCount) - 1)
Do While (i >= 0)
If (Not formArray(i) Is Nothing) Then
formArray(i).Dispose
End If
i -= 1
Loop
If (Not Me.smallIcon Is Nothing) Then
Me.smallIcon.Dispose
Me.smallIcon = Nothing
End If
Me.ResetSecurityTip(False)
MyBase.Dispose(disposing)
Me.ctlClient = Nothing
Dim menu As MainMenu = Me.Menu
If ((Not menu Is Nothing) AndAlso (menu.ownerForm Is Me)) Then
menu.Dispose
MyBase.Properties.SetObject(Form.PropMainMenu, Nothing)
End If
If (Not MyBase.Properties.GetObject(Form.PropCurMenu) Is Nothing) Then
MyBase.Properties.SetObject(Form.PropCurMenu, Nothing)
End If
Me.MenuChanged(0, Nothing)
Dim menu2 As MainMenu = DirectCast(MyBase.Properties.GetObject(Form.PropDummyMenu), MainMenu)
If (Not menu2 Is Nothing) Then
menu2.Dispose
MyBase.Properties.SetObject(Form.PropDummyMenu, Nothing)
End If
Dim menu3 As MainMenu = DirectCast(MyBase.Properties.GetObject(Form.PropMergedMenu), MainMenu)
If (Not menu3 Is Nothing) Then
If ((menu3.ownerForm Is Me) OrElse (menu3.form Is Nothing)) Then
menu3.Dispose
End If
MyBase.Properties.SetObject(Form.PropMergedMenu, Nothing)
End If
Else
MyBase.Dispose(disposing)
End If
End Sub

Answer 4

me.dispose这个是最彻底 释放资源 Me.Close 这个是关闭 end 只是结束 一般用在程序的语句中 如结束语句